hbase 报错gc wal.FSHLog: Error while AsyncSyncer sync, request close of hlog YouAr-优快云博客

博客内容涉及一个关于HBase运行过程中遇到的常见错误日志，该错误涉及到GC长时间运行导致ZooKeeper认为RegionServer已死，进而引发一系列Region恢复操作。博主分析了问题的根本原因，包括GC执行过慢和CPU资源限制，并提出了调整JVM参数以优化Survivor区大小和CMS触发阈值的解决方案，以减少Full GC的发生，从而避免类似问题的再次出现。

一个很常见的报错log

2015-03-05 03:10:35,461 FATAL [regionserver60020-WAL.AsyncSyncer0] wal.FSHLog: Error while AsyncSyncer sync, request close of hlog
org.apache.hadoop.ipc.RemoteException(java.io.IOException): BP-1540478979-192.168.5.117-1409220943611:blk_1098635649_24898817 does not exist or is not under Constructionblk_1098635649_24900382
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkUCBlock(FSNamesystem.java:5956)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.updateBlockForPipeline(FSNamesystem.java:6023)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.updateBlockForPipeline(NameNodeRpcServer.java:645)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.updateBlockForPipeline(ClientNamenodeProtocolServerSideTranslatorPB.java:874)
        at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$
2015-03-05 03:10:35,460 FATAL [regionserver60020-WAL.AsyncSyncer2] wal.FSHLog: Error while AsyncSyncer sync, request close of hlog
org.apache.hadoop.ipc.RemoteException(java.io.IOException): BP-1540478979-192.168.5.117-1409220943611:blk_1098635649_24898817 does not exist or is not under Constructionblk_1098635649_24900382
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkUCBlock(FSNamesystem.java:5956)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.updateBlockForPipeline(FSNamesystem.java:6023)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.updateBlockForPipeline(NameNodeRpcServer.java:645)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.updateBlockForPipeline(ClientNamenodeProtocolServerSideTranslatorPB.java:874)
        at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProt